258252775551 has 20 divisors (see below), whose sum is σ = 385824199992. Its totient is φ = 172151027568.

The previous prime is 258252775549. The next prime is 258252775591. The reversal of 258252775551 is 155577252852.

258252775551 is a `hidden beast` number, since 2 + 5 + 82 + 5 + 2 + 7 + 7 + 5 + 551 = 666.

It is not a de Polignac number, because 258252775551 - 2¹ = 258252775549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (258252775591) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 666345 + ... + 980061.

Almost surely, 2^258252775551 is an apocalyptic number.

258252775551 is a deficient number, since it is larger than the sum of its proper divisors (127571424441).

258252775551 is a wasteful number, since it uses less digits than its factorization.

258252775551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323892 (or 323883 counting only the distinct ones).

The product of its digits is 9800000, while the sum is 54.

The spelling of 258252775551 in words is "two hundred fifty-eight billion, two hundred fifty-two million, seven hundred seventy-five thousand, five hundred fifty-one".